I will try to help, but it doesn't sound good. Was the knocking coming from the engine? If so, I would say the main bearings are out of the engine because you mentioned the oil light was coming on. You replaced the alt and the battery, correct? And you mentioned that it is still going dead. Are you sure the used alt you got is any good? At this point, I would recommend you remove the starter, alt, and battery and take all of them to a parts store to have them bench tested. Most parts stores will do it for free. Then we will have an idea as to why the battery keeps going dead. Once we figure that out, then we can focus on the engine itself. But I will warn you, if the knock was from the engine, chances are it is spent and will either need replaced or rebuilt.
Let me know.
SPONSORED LINKS
Monday, August 26th, 2013 AT 8:36 PM